How Companies Actually Make Money
Every company runs on a model: who pays, for what, how often, and what it costs to deliver.
Gross margin — price minus the direct cost of delivering — decides how much room a business has for everything else.
Recurring revenue (subscriptions, contracts) is valued more highly than one-off sales because it's predictable.
When you evaluate any business — as an employee, customer or investor — start by asking how it makes money and what it costs to keep a customer.
A fixed cost stays the same as sales or customer activity changes within the company's current capacity. The lead developer's annual salary is usually a fixed cost because it does not change with each new user or sale. Variable costs rise or fall with activity: cloud hosting fees that scale with usage and sales commissions paid per deal are examples.
Contribution is the money left from a sale after subtracting its variable costs. It helps cover fixed costs; once those are covered, additional contribution adds to profit. If a product sells for $100 and its only variable costs are $40 in materials and labor, its contribution is $100 − $40 = $60.
To find break-even sales, divide fixed costs by the contribution from each sale. For this coffee shop, each order contributes $5 − $2 = $3, so $4,000 ÷ $3 = 1,333.33 orders. Round up to 1,334 whole orders: 1,333 orders would leave the shop $1 short of covering its fixed costs.
You, if you decided to offer freelance writing services, your price per article minus direct costs (like a specific stock photo purchase) would be your gross profit. This profit then has to cover your 'fixed' costs like your laptop, internet, and subscription to a grammar checker.
Learning objective
Trace revenue into contribution, operating profit and cash obligations.
Understand the mechanism
Start with the payer, purchase reason and delivery process. Gross profit is revenue minus direct delivery costs; gross margin is gross profit divided by revenue. A dollar profit and a percentage margin are different measures.
A recurring contract can improve visibility, but only if customers remain, pay and can be served profitably. Customer concentration, cancellation rights and support costs can make seemingly predictable revenue fragile.
Put it to work
Map the economics of one sale, then a month of sales. Separate variable costs from fixed costs and ask how volume changes each. A model with positive contribution still needs enough sales to pay rent, systems and salaries.
Compare models using cash tied up in inventory, acquisition costs and capacity. A lower-margin business with fast payment can be easier to finance than a high-margin business paid months later.
Worked example
- 1
A product sells for $50 and costs $20 to deliver: gross profit is $30 and margin is 60%.
- 2
Monthly fixed costs of $900 require 30 such sales to break even before other costs: $900 ÷ $30 = 30.
- 3
At 40 sales, contribution is $1,200 and operating profit in this simplified model is $300.
A strong model explains both how money arrives and what must be spent to earn it.
Your practice lab
Price is $80, direct cost $32 and fixed monthly costs $960. Find gross margin and break-even sales.
Personal scratchpad · not graded or saved
SaaS vs. Artisan: A Tale of Two Models
Consider 'ConnectSphere', a software-as-a-service (SaaS) company offering a project management tool for $30 per user per month. The direct cost to serve one more user is almost zero, giving them a very high gross margin. Their revenue is recurring and predictable as long as customers stay subscribed. However, their fixed costs are enormous: a team of expensive developers, marketers, and a large office space.
Now, consider 'Oak & Iron', a workshop that builds custom dining tables. Each table sells for $5,000, but the direct costs for premium wood, materials, and skilled labor are $3,000. This yields a gross profit of $2,000 per table, but a gross margin of only 40%. Their revenue is non-recurring and unpredictable; they must find a new customer for every single sale. Their fixed costs, however, are much lower: just the rent for a small workshop.
ConnectSphere's model is attractive to investors because of its predictable, high-margin recurring revenue, but it needs thousands of subscribers just to cover its high fixed costs. Oak & Iron has inconsistent cash flow, but each sale makes a large contribution to its low fixed costs. This shows how gross margin, recurring revenue, and fixed costs interact to create very different business challenges.
The 'best' business model depends on more than just gross margin; it's a balance between predictability of revenue, cost structure, and the cash needed to operate.
Illustrative example — names and figures are composites for teaching.
Outline the basic unit economics for your venture. Identify one core product or service, set a realistic price, estimate its direct (variable) costs, and calculate the gross profit and gross margin for one sale.
Example: Venture: 'Fresh Start' Home Organization. Service: One 4-hour organization session. Price: $200. Direct Costs: $15 (travel fuel/time) + $25 (estimated supplies like labels, bins) = $40. Gross Profit: $200 - $40 = $160. Gross Margin: $160 / $200 = 80%.
Go deeper — outside resources
- U.S. Small Business Administration — learning hub · U.S. Small Business Administration
- Costs, revenue, and profit · Khan Academy
Key ideas
- Model = who pays, for what, how often
- Gross margin funds everything else
- Predictable revenue is worth more
Try it: Pick your employer or a company you buy from and describe its model in two sentences.
Quick check
1. Price $50, direct cost $20. Gross margin is…
2. Why is recurring revenue valued more highly?
3. Which of the following is most likely a fixed cost for a software company?
4. A business sells a product for $100. The direct costs (materials, labor) are $40. What is the contribution from one sale?
5. A coffee shop has fixed monthly costs of $4,000. Their average customer order is $5, and the direct cost of that order is $2. How many orders do they need to sell just to cover their fixed costs?
6. Company A has a 70% gross margin but waits 90 days to get paid. Company B has a 30% gross margin but is paid immediately in cash. Which is a likely challenge for Company A?